Conditional Handover Control With Beam-Specific PRACH Resources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cellular communication systems face challenges in managing signaling loads during conditional handovers, particularly in scenarios involving mobile IAB nodes, where simultaneous PRACH transmissions can overload the uplink direction.
Innovation Solution
Implementing a communication control method that distributes the timing of conditional handovers and PRACH transmissions by configuring different waiting times or resources for each user equipment, ensuring each UE transmits PRACH at a unique time or using distinct PRACH resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If simultaneous conditional handovers are executed for multiple user equipments, then handover efficiency is improved, but uplink signaling load increases and causes collisions
Solution Approach 1:
The patent segments the uplink PRACH resources by associating them with different downlink beams. Each user equipment transmits PRACH using resources corresponding to its specific beam, which divides the uplink signaling load across different spatial resources and prevents collisions while maintaining efficient handover execution.
2Adaptability or versatility
If PRACH resources are shared among multiple user equipments, then resource utilization is improved, but transmission collisions occur during conditional handover
Solution Approach 1:
The patent applies local quality by making PRACH resources beam-specific rather than universally shared. Each beam has its own associated PRACH resources, allowing resources to be shared within the constraints of spatial separation. This ensures that while resources are efficiently utilized, collisions are prevented by assigning unique beam-resource mappings to different user equipments.
Data Source
AI summary
In an aspect, a communication control method is used in a cellular communication system. The communication control method includes transmitting, by a base station, a conditional reconfiguration to a user equipment. The communication control method includes executing, by the user equipment, a conditional handover after a predetermined amount of time has elapsed since detection of a predetermined condition. Here, the detection of the predetermined condition is either satisfaction of a trigger condition included in the conditional reconfiguration or reception of an execution instruction for the conditional handover from the base station. The predetermined amount of time is an amount of time different for each of the user equipments.